“Millennials look at email like they look at the telephones on their desks—they don’t use it,” says Cindy Crescenzo, president of Crescenzo Communications.

Do, however, send emails when you have specific questions or when you want to reach certain employee groups.

Second, when it comes to your intranet, don’t expect millennials to show up.

“Sure, you need intranets as a repository of information—but you have to drive millennials to them,” says Dan Hill, president of Ervin|Hill Strategy in Washington, D.C., where he helps develop employee communication strategies for clients.

To lure them to the intranet, use the tools millennials know, such as texts or internal social media networks.